<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>获取请求体数据</title>
</head>
<body>
<form action="http://127.0.0.1:9000/login" method="post">
  <label>账号：<input type="text" name="username"></label>
  <label>密码：<input type="password" name="password"></label>
  <input type="submit" name="" id="" value="提交">
</form>
</body>
</html>